Afropyrgota V. Korneyev, 2015

Korneyev, V. A., 2015, Pyrgotid Flies Assigned To Apyrgota. Iii. Species Of Afropyrgota Gen. N. And Tylotrypes (Diptera, Pyrgotidae), Vestnik Zoologii 49 (1), pp. 25-40 : 26-27

publication ID

https://doi.org/ 10.1515/vzoo-2015-0003

DOI

https://doi.org/10.5281/zenodo.6403945

persistent identifier

https://treatment.plazi.org/id/03BFBB46-FB13-FFA4-7FA6-A90907E3FDD3

treatment provided by

Felipe

scientific name

Afropyrgota V. Korneyev
status

gen. nov.

Afropyrgota V. Korneyev , gen. n.

Type species: Apyrgota marshalli Hendel, 1914 .

D i a g n o s i s. Robust, wasp-like flies, very similar to Eupyrgota in having large subocular sclerite, bare scutellum, wing with spurious vein inserted to deep flexion of R 2+3, femora with two ventral rows of shortened and thickened setae on ventral side; mostly bare epandrium with elongated surstyli (as in Eupyrgota s. str.), oviscape with opening directed ventrally, paired rows of stiff setulae located anterolaterally of it, and short, T- or Y-shaped aculeus with strongly widened shoulders basally. They differ from Eupyrgota by the saddlelike prosternum without nipple or finger-like projections ventrally, and oviscape bearing no postero-laterally directed sclerotized hooks.

D e s c r i p t i o n. Afrotropical Region (from Nigeria to Kenya and Tanzania).

Head. Frons and facialium broad, wider than eye, face with narrow, often very low carina; epistome low; subocular sclerite large; setae moderately short: oc, or and vte shorter than or at most as long as poc.

Thorax. Presternum saddle-like, without nipple-like ventral projections. Scutellum bare, with two pairs of setae.

Legs. Female fore and mid trochanters without thickened setulae; mid femur of female with or without femoral organ; setae of apicoventral rows moderately thickened and shortened.

Wing usually grey microtrichose, sometimes widely or almost entirely yellow tinged; subcostal vein straight, interrupted at fusion with costa. Pterostigma short. Vein R 2+3 deeply and sharply bent at insertion of spurious vein, R 4+5 bare. Costal vein reaching apex of M. Cell bcu with calypters with fine and short fringe, without spinulose cilia.

Abdomen. Sternites 1 and 2 entirely fused, forming long Y-shaped synsternite 1+2.

Male genitalia. Hypandrium with phallic guide. Epandrium almost entirely bare, with elongate lateral surstyli. Medial surstyli without prensisetae.

Female genitalia. Oviscape shorter than abdomen; its opening ventrally directed; apical fields of trichoid sensilla present: on lateroventral lobe (with thick setulae arranged in two rows — fig. 2, 2 View Fig : lvl; 4, 9; 8, 4) and dorsomedial lobe ( fig. 2, 2 View Fig : dl); medioventral part at the apex widely desclerotized ( fig. 2 View Fig , 1 View Fig ; 4 View Fig , 8; 8 View Fig , 4 View Fig ). Sclerotized hooks distal of them absent. Aculeus short, strongly widened in basal one-third and narrowly stiletto-like in apical portion (Y-like, see fig. 2 View Fig , 3 View Fig ; 4 View Fig , 10 View Fig ; 8 View Fig , 5 View Fig ). Ventral receptacle tubular, with spherical apical portion ( fig. 2 View Fig , 4 View Fig ). One or two unequal smooth, poorly sclerotized, slightly curved spermathecae observed in few dissected specimens (related species of Eupyrgota usually have 2 larger and one smaller spermatheca, and I suppose this could be actual number of spermathecae in Afropyrgota , too, while the other could be lost during preparation).

Key to species of Afropyrgota

1. Orbit with opalescent or matt, microtrichose area at level of antenna base ( fig. 7 View Fig , 2 View Fig ). Wing yellow with slightly darker apex ( fig 7 View Fig , 1 View Fig , 5 View Fig ). Thorax, femora and abdomen dark reddish brown, black setulose. Scutellum with 3 pairs of sctl ( fig. 7 View Fig , 4 View Fig ). WL> 15 mm. Tanzania. ....................... Afropyrgota uzungwa sp. n.

— Orbit entirely shining. WL <15 mm. Other characters variable. ............................................................... 2.

2. Mesonotum densely and long black setulose ( fig. 3 View Fig , 2 View Fig ). Scutellum with 3 pairs of sctl ( fig. 3 View Fig , 5 View Fig ). Proepisternal ridge with 8–10 long setae. Oviscape with 2 yellow hook-like, anteromesally directed lobes ( fig. 3 View Fig , 9 View Fig ). Wing grey microtrichose with two darker marks. Female mid femur yellowish setulose, without femoral organ ( fig. 3 View Fig , 7 View Fig ). Nigeria. ............................................................... Afropyrgota mambilla sp. n.

— Mesonotum moderately short reddish brown setulose. Scutellum with 1–2 pairs of sctl. Proepisternal ridge with 2–6 moderately short setae. Oviscape without such lobes. Wing and mid femur variable. ..... 3.

3. Scutellum with one pair of sctl ( fig. 1 View Fig , 5 View Fig ). Frons widely black. Mid femur with very large cuneiform femoral organ almost entirely covering its apical half ( fig. 1 View Fig , 7 View Fig ). Kenya. ..... Afropyrgota copelandi sp. n.

— Scutellum with two pairs of sctl. Frons and mid femur variable. ............................................................... 4.

4. Body entirely reddish yellow setulose, including pleura, abdomen and legs. Mid femur with cuneiform femoral organ narrower than femur ( fig. 6, 6 View Fig ). Nigeria, Kenya. .............................. Afropyrgota ota sp. n.

— Setae on pleura, abdomen and legs black or dark brown. Mid femur without femoral organ, densely brown setulose ( fig. 4 View Fig , 7 View Fig ). Nigeria, Kenya, DR Congo ( Zaïre). ............... Afropyrgota marshalli (Hendel)

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Diptera

Family

Pyrgotidae

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